If the UART bus clock has a gate, it must be enabled before the UART can be used.
Signed-off-by: Samuel Holland samuel@sholland.org ---
Changes in v2: - Only enable the first clock, as using the clk_get_bulk() API pushes a board (phycore-rk3288) over its SPL size limit.
drivers/serial/ns16550.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 7592979cab5..072419343a3 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -507,6 +507,7 @@ int ns16550_serial_probe(struct udevice *dev) struct ns16550 *const com_port = dev_get_priv(dev); struct reset_ctl_bulk reset_bulk; fdt_addr_t addr; + struct clk clk; int ret;
/* @@ -524,6 +525,10 @@ int ns16550_serial_probe(struct udevice *dev) if (!ret) reset_deassert_bulk(&reset_bulk);
+ ret = clk_get_by_index(dev, 0, &clk); + if (!ret) + clk_enable(&clk); + com_port->plat = dev_get_plat(dev); ns16550_init(com_port, -1);